C4 - Metal Structure and Properties

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What is good in metals having all different properties?
Makes them suitable for different uses
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What is an example of a physical property of a metal?
The high thermal conductivity of copper which can be used for the base of a saurcepan.
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What is an example of a chemical property of a metal?
The resistance to attack by oxygen or acids shown by gold
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Why do metals have high boiling and melting points?
Because they have strong metallic bonds. A lot of energy is needed to overcome strong attractions between delocalised electrons and the close-packed positive metal ions.
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What are some examples of metals that conduct electricity very well?
Cooper, silver and gold
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What is a metallic bond?
A strong electrostatic force of attraction between close-packed positive metal ions and a 'sea' of delocalised electrons
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What are superconductors?
Materials that conduct electricity with little or no resistance
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What happens when a substance goes from its normal state to a superconducting state?
It no longer has any magnetic fields inside it
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What are the potential benefits of superconductors?
Loss-free power transmission, super fast electronic circuits, powerful electromagnets.
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What is a difficulty of superconductors?
There needs to be a good deal of developmemnt work before the true potential of superconductors is realised. For example, they only work at very low temperatures, superconductors that function at 20 degrees need to be developed.
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Other cards in this set

Card 2

Front

What is an example of a physical property of a metal?

Back

The high thermal conductivity of copper which can be used for the base of a saurcepan.

Card 3

Front

What is an example of a chemical property of a metal?

Back

Preview of the front of card 3

Card 4

Front

Why do metals have high boiling and melting points?

Back

Preview of the front of card 4

Card 5

Front

What are some examples of metals that conduct electricity very well?

Back

Preview of the front of card 5
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